Hydraulic elevator



(No Model.)

G. W. CLAYTON.

HYDRAULIO ELEVATOR.

No. 410,533. Patented Sept. 3, 1889.

W'TVESSES '9 Z. l/VI/E/VTO/i {Q0 7 7 621977 Afforneys u. PETERS, FhobLflhogvaplmr. Washington, n.0,

.UNITED STATES PATENT OFFICE.

GEORGE \V. CLAYTON, OF CLEVELAND, OHIO.

HYDRAULIC ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 410,533, dated September 3, 1889. Application filed January 23, 1888. $erial No. 261,588. (No model.)

To all whom, it may concern:

Be it known that I, GEORGE \V. CLAYTON, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in l'lydraulic Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

.WIy invention relates to improvements in hydraulic elevators in which the piston-rod leading from the primary watencylinder is permanently attached to the cross-head that carries the reciprocating sheaves, this primary cylinder being always used in operating the elevator. One or more auxiliary cylinders are employed to aid in lifting heavy loads. IVhere there is long enough floorspace the auxiliary cylinder is set in line with the primary cylinder and at the rear of the latter, the piston-rod of: the auxiliary cylinder extending into the primary cylinder and abutting the rear side of the primary piston. \Vhere there is not suflicient floor-space to admit of setting the cylinder tandem two small cylinders may be arranged, respectively, 011 either side of the primary cylinder, in which case the piston-rod of such auxiliary cylinders abut the rear side of the crosshead, such auxiliary cylinder or cylinders being used only in hoisting heavy loads, to the end that in hoisting light loads a great saving of water is effected by using the primary cylinder alone.

In the accompanying drawings, Figure 1 is a plan view showing two cylinders set tandem. Fig. 2 is a plan showing three cylinders arranged side by side, both figures being partly in section.

A primary water-motor for operating the elevator mechanism and for hoisting light loads consists, in the main, of water-cylinder A, piston a, piston-rod a, and cross-head B, this piston-rod being permanently attached to the cross-head, and the latter carrying the reciprocating sheaves for operating the hoisting cable. The cross a head is usually provided with anti friction wheels Z), that travel 011 ways 0, the latter forming a part of the framework of the motor.

The auxiliary motor (shown in Fig. l) consists of water-cylinder E, set in line with and at the rear of the primary cylinder. Cylinder E is provided with piston (not shown) and pistonrod c, the latter passing through a stufling-box A, located at the center of the rear head of cylinder A. \Vhen the pistons of the two cylinders are at the rear end of their strokes, the rod 6 abuts the rear side of piston a. In Fig. 1 piston a is shown in position advanced a short distance.

Each cylinder is provided with suitable valves for admitting and discharging water from the respective cylinders, several varieties of valves suitable for the purpose being well known. Each valve is provided in the usual manner with suitable cable leading along the elevator-shaft for operating such valve. For lighter medium loads only the primary motor is used, thus effecting a great saving in water over that required for the heavy load, in which latter case both motors are used simultaneously. When there is not floorspace for setting the cylinder tandem, two small auxiliary cylinders E are set by the side of the cylinder A, as shown in Fig. 2, the piston-rods c of such auxiliary cylinders abutting the rear side of cross-head 1;. A single valve, with branch pipe leading to the cylinder E, is usually employed for the purpose. \Vith either construction the forward end of the different cylinders are usually left open. The stationary sheaves D are set at the rear of the motor, and the hoistingcable (not shown) leads around these two se ries of sheaves, and from thence leads to the elevator, of course passing around the necessar guiding-sheaves, such arrangement of cable being substantially as heretofore used.

\Vhat I claim is- 1. In a hydraulic elevator, the combination, with a primary motor, a piston and pistonrod therein, and a cross-head secured to the latter, of auxiliary motor, piston therein, the latter having piston-rod secured thereto, said piston and rod running out of frictional contact with the piston of the primary motor and adapted to abut the reciprocating part of the primary motor in order to co-operate with the latter in hoisting heavy loads, substantially as set forth.

2. In a hydraulic elevator, the combination, with primary and auxiliary meters, of an independent piston in each of said motors and In testimony whereof I sign this specificaindependent piston-rods secured to the pistion, in the presence of two Witnesses, this 10 tons, the piston and piston-rod of the auxili- 18th (lay of August, 1887. ary motor bein located out of frictional con- T 5 tact with the piston of the primary motor and GEORGE OLAX adapted to abut the reciprocating part of the WVitnesses primary motor to co-operate with the latter, CHAS. H. DORER, substantially as set forth. ALBERT E. LYNCH. 

